Let’s gooooo. I’m not so sure if I can offer meaningful knowledge, but I’m gonna try. I think one of the main things that makes us humans dislike running (in the beginning) is the rapid change in heart rate. Going from resting to like 180-190BPM sucks donkey balls. I find it really easy tho to start off at a chill stroll and then—painstakingly slowly—I increase the speed til I’m straight up jogging. Never sprinting. It doesn’t suck at all and I’m now at the point I can casually go for 5-7miles.